With days to go before the Pittsburgh Marathon, the Boston bombing has placed an increased emphasis on security for the May 5 race and how the city will pay for it. Not to worry, says Mayor Luke Ravenstahl.

"I know there's been some talk about funding and how we're going to pull this off. Let me put all those kind of concerns to bed. We're going to figure this out," Ravenstahl said at a Thursday news conference. "We're going to have the proper number of public safety personnel on board that day. The marathon is not going to go bankrupt this year. It's not going to go bankrupt next year. We're going to figure it out in partner, like we always have, to make this a wonderful event."

"It's going to be a great day. It's going to be a safe day," added Pittsburgh Marathon director Patrice Matamoros. Recently, she had expressed concerns that the new financial implications could bankrupt Three Rivers Marathon Inc., the nonprofit group that puts on the race.

Extra security measures will begin with a perimeter at the start and finish of the course, where several side streets will be shut down and the area will be fenced in for runners. Nobody will be allowed to bring large backpacks or duffel bags. Instead, runners will be required to check in their gear using clear, plastic drawstring bags that they'll pick up with their race packets.

Public safety officials will also rely heavily on surveillance cameras, including those owned by city businesses. And Mike Huss, the city's public safety director, said there are more plans that can't be discussed publicly because of security reasons.

"There will be some very visible things, and many invisible security things in place that you will not see. One of the things you will see are a lot of explosive K-9s and the like," said Huss, He added that the city's paramedic union is donating all the money from the time they'll work during the marathon to The One Fund Boston.

Pittsburgh's acting police chief, Regina McDonald, was not at the news conference on Thursday. One day after the April 15 bombing in Boston, she said, "We're aware of what's going on. We're making the necessary adjustments and changes and we'll continue to do that."

Ray Demichiei, the city's deputy emergency management director, has said that additional security could come from a multitude of agencies. "We're going to put more feet on the ground and more eyes in the crowds, whether they be National Guard personnel or law enforcement officers or private security," he said.

Last week, Matamoros said that 350 uniformed officers and 200 security guards would be stationed throughout the city for the race, as well as thousands of feet of perimeter fencing. But even with security precautions in place, she said there's always a risk. "I think that it's never enough. There's always a hole somebody can get through. I think there's always a place, but I think that what we've done is we've taken that risk of somebody getting in and taking it way down, as much as you can possibly eliminate that risk."

Matamoros said the 2010 Pittsburgh Marathon "changed everything 110 percent" when a microwave that was left on a sidewalk just a few blocks away from the finish line prompted a bomb scare. The device was eventually detonated by the bomb squad.

In Photos: 2012 Pittsburgh Marathon

In Photos: 2012 Pittsburgh Marathon

Over 25,000 people took part in the 2012 Pittsburgh Marathon on Sunday in very warm weather conditions. This was the scene in downtown Pittsburgh around 7 a.m. Sunday morning. Scroll through this slideshow for photos from the course. You can also look through photos sent in by other WTAE.com users.

This was the scene along Penn Avenue before the race. Cars couldn't get by because the lines for the restrooms got so long. It's a long run ahead!

A look at the start line around :15 minutes before race time.

Members of the Channel 4 Action News morning crew on the "T" to the start line at Gateway Center.

Channel 4 Action News reporter Sheldon Ingram was one of the bike volunteers for the race. He raced alongside some of the wheelchair competitors.

Sheldon's in place for the start of the race.

The displaying of the U.S. Flag for the singing of our National Anthem and the start of the 2012 Pittsburgh Marathon.

The handicapped bike racers are off!

Elite runner Jed Christensen gets a little bit of flexing in before he competes in the half marathon. The 25-year-old Greenville native finished 5th, with a time of 1:06:30.

The gun is fired right at 7:30 a.m., and the runners are off!

Less than 15 minutes into the race, and the elite runners have already made their way to mile 3 -- the 16th Street Bridge.

This marathon helicopter was hovering so close to the bridge. It felt like an action movie being filmed!

Is this a frownie?

Temperatures were much warmer than the last two marathons. Some chose to go with just the essentials to stay cool.

Some had even more fun with it.

Channel 4 Action News Anchor/Sports Director Andrew Stockey was the first to pass our camera. He's breezing along at this point. He finished the half-marathon in 2:06:46.

Janelle Hall takes this shot of Demetrius and John on the 16th Street Bridge.

Here's John Meyer smiling for the camera, with Janelle Hall in the background. John finished the half-marathon in 2:18:47.

They sped by so fast, we almost missed Janelle Hall and Demetrius Ivory on camera! They both did the half-marathon. Janelle finished with a time of 2:18:47 and Demetrius finished in 2:09:08.

Our photog actually ran down the bridge to get one more shot of the trio.

About 45 minutes into the race, you can see the bridge is now full with runners.

The runners make their way off the 16th Street Bridge onto the North Side. This was the first of four bridges runners cross in the first 7 miles.